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Abstract:

A power saving system includes a sensor, a processor, a timer, and a
switch. The sensor senses movements in the diaphragm of the loudspeaker.
The processor determines whether the loudspeaker is power-on and in use
or power-on but not in use. The processor further determines whether a
preset period of time has elapsed since the indication of power-on but
not in use was first given. If the preset period of time has elapsed, the
processor further controls the switch to disconnect the power source from
the loudspeaker.

Claims:

1. A power saving system used for a loudspeaker, the power saving system
comprising: a sensor set in the loudspeaker to sense the movements of a
diaphragm of the loudspeaker; a processor to receive the diaphragm
movements from the sensor, thereby determining whether the loudspeaker is
power-on but not in use; a timer, wherein the processor further
determines whether a preset period of time has elapsed since the
indication of power-on but not in use was first given by the timer; and a
switch connected to a power source and a power circuit of the
loudspeaker, wherein when the preset period of time has elapsed since the
indication of power-on but not in use was first given, the processor
further controls the switch to disconnect the power source from the power
circuit.

2. The power saving system of claim 1, wherein the processor compares
every two consecutive diaphragm movements received from the sensor to
determine whether a difference between the two consecutive diaphragm
movements is greater than a preset value, if the difference between the
two consecutive diaphragm movements is less than or equal to the preset
value, a determination is made that the loudspeaker is power-on but not
in use.

3. The power saving system of claim 1, wherein if the loudspeaker is
power-on but not in use, the processor outputs a time signal to the timer
to start the timer; if the loudspeaker is power-on and in use, the
processor outputs a stop signal to stop the timer; as the timer is
running, the processor determines whether the timer has been running for
a preset period of time to determine whether the preset period of time
has elapsed since the indication of power-on but not in use was first
given.

4. A power saving method used for a loudspeaker, the power saving method
comprising: sensing the movements of a diaphragm of the loudspeaker and
transmitting the diaphragm movements to a processor; the processor
determining whether the loudspeaker is power-on but not in use according
to the diaphragm movements received from the sensor; the processor
determining whether a preset period of time has elapsed since the
indication of power-on but not in use was first given; and disconnecting
a power source from the loudspeaker if the preset period of time has
elapsed since the indication of power-on but not in use was first given.

5. The power saving method of claim 4, wherein the step of the processor
determining whether the loudspeaker is power-on but not in use according
to the diaphragm movements received from the sensor comprises: comparing
every two consecutive diaphragm movements received from the sensor to
determine whether a difference between the two consecutive diaphragm
movements is greater than a preset value; if the difference is less than
or equal to the preset value, a determination is made that the
loudspeaker is power-on but not in use; and if the difference is greater
than the preset value, a determination is made that the loudspeaker is
power-on and in use.

6. The power saving method of claim 4, wherein the step of the processor
determining whether a preset period of time has elapsed since the
indication of power-on but not in use was first given comprises: if the
loudspeaker is power-on but not in use, the processor outputs a time
signal to start the timer; if the loudspeaker is power-on and in use, the
processor outputs a stop signal to stop the timer; and as the timer is
running, if a preset time has elapsed, a determination is made that the
preset period of time has elapsed since the indication of power-on but
not in use was first given.

Description:

BACKGROUND

[0001] 1. Technical Field

[0002] The present disclosure relates to a system and a method for saving
power of a loudspeaker.

[0003] 2. Description of Related Art

[0004] When a loudspeaker is not used, users usually forget to power it
off. The loudspeaker continues to consume energy however, and if the
loudspeaker is on for a long time, its working life will be reduced.

BRIEF DESCRIPTION OF THE DRAWINGS

[0005] Many aspects of the embodiments can be better understood with
reference to the following drawings. The components in the drawings are
not necessarily drawn to scale, the emphasis instead being placed upon
clearly illustrating the principles of the present embodiments. Moreover,
in the drawings, like reference numerals designate corresponding parts
throughout the several views.

[0006] FIG. 1 is a block diagram of an exemplary embodiment of a power
saving system for a loudspeaker.

[0007] FIG. 2 is a flowchart of an exemplary embodiment of a power saving
method for a loudspeaker.

DETAILED DESCRIPTION

[0008] The disclosure, including the accompanying drawings, is illustrated
by way of example and not by way of limitation. It should be noted that
references to "an" or "one" embodiment in this disclosure are not
necessarily to the same embodiment, and such references mean at least
one.

[0009] As is known, when a loudspeaker is powered on and in use, the range
of movement of the diaphragm is large, in respect of both amplitude and
frequency. When the loudspeaker is powered on but no electronic sound
signals is send to the loudspeaker, the range of movement of the
diaphragm is non-existent or substantially small. In this embodiment, a
determination can be made as to whether the loudspeaker is powered on,
and is either being used or is not being used according to the
description above.

[0010] Referring to FIG. 1, an exemplary embodiment of a power saving
system for a loudspeaker 5 includes a sensor 10, a processor 12, a timer
15, and a switch 16. The sensor 10 is set in the loudspeaker 5 to sense
the movement of the diaphragm. The processor 12 is connected to the
sensor 10, to the timer 15, and to the switch 16. The switch 16 is
further connected to a power source 20 and a power circuit 22 of the
loudspeaker 5.

[0011] In the form of corresponding signals, the sensor 10 transmits the
diaphragm movements of the loudspeaker 5 to the processor 12. The
processor 12 compares every two consecutive signals from the sensor 10 to
determine whether the difference between them is greater than a preset
value. When the difference between two consecutive signals is less than
or equal to the preset value, it indicates that the loudspeaker 5 is
powered on but no electronic sound signals is send to the loudspeaker 5.
At this time, the processor 12 outputs a time signal to the timer 15 to
activate the timer 15 as the processor 12 continues to compare signals.
If the difference between two consecutive signals is greater than the
preset value, it indicates that the loudspeaker 5 is in use and the
processor 12 outputs a stop signal to the timer 15, which causes it to
stop and reset.

[0012] As the timer 15 is running, the processor 12 determines whether the
timer 15 has been running for a preset period of time. If the timer 15
has been running for the preset period of time, the processor 12 outputs
a signal to the switch 16. The switch 16 disconnects the power source 20
from the power circuit 22 of the loudspeaker 5, thus powering off the
loudspeaker 5.

[0013] Referring to FIG. 2, an exemplary embodiment of a power saving
method for a loudspeaker 5 includes the following steps.

[0014] In step S1, when the loudspeaker 5 is powered on, the sensor 10
senses the movements of the loudspeaker diaphragm and transmits signals
corresponding to the movements to the processor 12.

[0015] In step S2, the processor 12 determines whether power is being
supplied to the loudspeaker 5, and whether the loudspeaker 5 is in use,
or is not in use according to the signals being received from the sensor
10. If the loudspeaker 5 is powered on and in use, it returns to step S1.
If the loudspeaker 5 is powered on but no electronic sound signals is
send to the loudspeaker 5, it flows to step S3.

[0016] In the embodiment, the processor 12 compares every two signals
received consecutively from the sensor 10 to determine whether a
difference greater than a preset value exists between them. If the
difference between them is less than or equal to the preset value, it
indicates that the loudspeaker 5 is powered on but no electronic sound
signals is send to the loudspeaker 5. If the difference between the two
signals is greater than the preset value, it indicates that the
loudspeaker 5 is powered on and is in use.

[0017] In step S3, the processor 12 determines whether a preset period of
time has elapsed since the indication of power-on but not being used was
first given. If the preset period of time has elapsed, it flows to step
S4, if not, it returns to step S1.

[0018] In the embodiment, when the difference between the two consecutive
signals is less than or equal to the preset value, the processor 12
outputs a signal to the timer 15 to activate the timer 15 as it continues
to compare signals. If the difference between signals is greater than the
preset value, it indicates that the loudspeaker 5 is used, and the
processor 12 outputs a signal to stop the timer 15. The timer 15 stops
timing and is reset. Moreover, at any time when the timer 15 is running,
the processor 12 determines whether a preset time has elapsed.

[0019] In step S4, the processor 12 outputs a signal to the switch 16. The
switch 16 disconnects the power source 20 from the power circuit 22 of
the loudspeaker 5, thus powering off the loudspeaker 5.

[0020] The foregoing description of the exemplary embodiments of the
disclosure has been presented only for the purposes of illustration and
description and is not intended to be exhaustive or to limit the
disclosure to the precise forms disclosed. Many modifications and
variations are possible in the light of the information above. The
embodiments were chosen and described in order to explain the principles
of the disclosure and their practical application so as to enable those
of ordinary skill in the art to utilize the disclosure and other various
embodiments with such various modifications as are suited to the
particular use contemplated. Alternative embodiments will be apparent to
those of ordinary skills in the art to which the present disclosure
pertains without departing from its spirit and scope. Accordingly, the
scope of the present disclosure is defined by the appended claims rather
than the foregoing description and the exemplary embodiments described
therein.